Automatic starting and stopping device for phonographs



May 14, 1929 J. R. NocK ET AL. 1,713,141

AUTOMTQ STARTING AND STOPPIN-G DEVICE FOR PHQNOGRPHS Filed Deo. '14, v1927 Patented May `,14, 1929.

AUNITED STATES 'PATENT `ori-tic,it.; f

JOHN n. Nook AND minimos rnonrspr BROOKLYN, NEW YORK;

AUTOMATIC STARTING AND sTorP'rNG nnvron Fon Enorme-Barns.

Application filed December 14, 1927. kSerial No. 2110,03?.`

This invention relates to phonograph stopping and starting devices and in particular` to one'whi'ch is automatic in its operation. ,V

A particular object of the invention is to provide an automatic starting and stopping device i'or use in connection with phonostopping will automati-- is dillerent,y consequently the number of' grooves per vspace ou records varies and as the result, in some records, the needle of the phonograph tone arm moves a greater distance to play a particular feature than it would on a phonograph record ot a diierent make, consequently, some means must be incorporated inan automatic device `of the character referred to which will compensate for the various grooved portions of diiterent records. Y f

A still further object of the invention is to provid-e a simplified mechanism having few parts which will not get out ot order and which may be secured to any phonograph with a minimum of time and labor.`

To enable others skilledin the art to fully comprehend the underlying features of our invention that they may embody the same in the various modifications in structure and relation contemplated,` a drawing depicting a preferred form has been annexed as a part of this disclosure and in such drawing, similar reference characters denote corresponding parts throughout all the views, of which,

Figure 1 is a top planjview of the phonograph starting and stopping mechanism constructedin accordance with ourV invention.

Figure 2 is aview in side elevation of the mechanism ,illustrated in Figure 1.

Figure 3 is an enlarged view in sectional elevati onof a portion ofthe mechanism show.- ing the end of the tone arm lever vin contact with an intermediate slide pinarrangement, and

Figure L is a fragmentary section showing a v'portion of they brake and tliebrake pad in the position it occupies when incontact with the v inner periphery of a turn table lange.

Reierring to the drawings iny detail, 5 1ndicates a tone arm of the usual type Ywlncliyls ppivotally supported in the tone arm base f6 secured in any suitable manner to the phonograph casing 7. This tone arm carries the usual reproducing unit and needle, not shown,

it being suiticient to note that the tone varm '5 is revolvably mounted in the ton'earm base 6 and this turning inovement'ipermits the sound box audits accompanying needle to be placedin vthe inner orouter reaches ot the groove that is cutinthe record, the record being indicated1 in the drawingby the numeral 8 and being mounted in the usual manner on the Aturntable 9 which is provided with a. depending edge flange 10. This turn table usually made of metal and is ope-rated in the well known manner torapidly revolve the disc so thatthe reproduction ofthe selection on thel recordis'carried out.. j

We are quite well aware'o'f the lactzthat stops have been providedV which are set to a predetermined position and atv the end of the selection a cut in the record, will auto#A matically operate to stop vvvthe turn table. However, to our knowledge, we have gone a step further andy have provided an automatic device whichwill, when the needle is placed at the beinnin 'of the record automaticall f e a .l

release the braking mechanism l and allow the turn table to' continue its operation and in carrying out our mechanism., we provide a clampA 1l which, throughtl'ie medium ol4 the bolts 12, [is secured about the tone arm 5, its movement therearound being prevented by suitable set screws '13 which are threaded through a tone ari lever portion 14, there being cast integral with this portion, a ltone armvlever 15. -This tone arm levergas il'- lustrated in Figure 3, may besubstantially U- sha ed and-ina i bearranced to cari' in its outer end, the adjusting screw-1G, this screw being provided at one end with at its other end with a knurledlingerl knob 18, the screw in its intermediate portioncarrying the locking nut19 through the medium of which it may be secured at any position of i its threaded adjustment in he tone` arm lever 15. rlhe purpose of this adjusting screw is to compensatefor the various makes of records and it is quite evident fromy a furtherdescripa head 17 and tion of the mechanism that the longitudinal adjustment ot the screws1 through the tone arm lever will cause the operation of the other mechanism at a predetermined time, or alter the tone arm lever has lswung through a pre determined length ot are during the playing ot the record.

It is quite evident that the tone arm lever will, ot course, swing with. the tone arm Whose vswinging motion is caused by arcuate travel of the needle relatively to the record 8 during the playing oi a selection and in order to transfer the motion ot' the; tone arm lever 15, I have provided in the path of the head 17 ot the adjusting screw, an intermedi-- ate slide pin Q0, this pin being provided on its ends with the flanges 21, one ot which is adapted to be engaged by the head 17 to slide Vthe pin 20 through the standard 22 which is suitably secured to the phonograph case 7. The flange 21 at the opposite end ot the pin 2O is adapted to engage the enlarged end 23 of a dog 9A, the dog itselt being pivoted as at 25 to a bed plate 26 which is secured to the phonograph case 7 at a pointl beneath the turn table and adjacent the 'flange thereoit. The end of the dog 24 is hooked at 27 to engage a suitable notch 29 formed inthe periphery ot a brake member this brake member is also pivoted as at 30 to the bed plate 26. The dog 24 is connected tlirough the medium et a tension spring 31 with the upstanding arm 32 which is east integral With the bed plate 26 so that the hook 27 is normally urged into connection with the brake member 29. This brake member being pivoted, can revolve to aposition Where its extended portion 3K1, carrying the braking pad 83, Will come into Contact with the inner surface of the depending 'flange l() ot the turn table 9. ln order that `the pac 33 will be normally urged 'toward the flange ot the turn table, Vive have provided as in dieatedr by" the numeral 35 a coil spring which connects a suitable lip 37 'formed on the brake member 29 With'a suitable lip 36 on the bed plate 26. The brake member 29 is further provided with a link arm 38 to the outer end otvvhich is connectedthrough the medium ot a pin and slot connection, the linlr 39 Which is pivotcd as at 40 to the tone arm lever 15, the slot ot the link is indicated by the numeral 10 and therein the pin 41, carried on theend ot the link arm 38 has free movement or rather, the end of the link has tree movement about the pin and the mechanism as illustrated in Figure 1 might be considered to be in the position that it will assume during the lplaying of a record, the travel ot the needle swinging the tone arm 5 in the position indicated by the arrow in Figure 1 until the needle is in the final groove of the record at Which time, the head 17 of the adjusting screw 16 will Contact with Vthe slide pin 20 causing it in'turnV to strike the portion 23 or the dog 9A thereby revolving the dog on its pivot point against the yaction of the spring 31 until the hooked end 27 disengages the brake member 29 at which time the spring 35 will revolve it about its pivot point 30 and. throw the pad or brake member 33 against the inner surface ot the fla-nge 10 of the turn table, thus causing the latter to stop. At this time, the record may be replaced and upon swinging the needle back to the starting groove, the tone arm Will be revolved in a counter clock-Wise direction with the result that the linlr 39 Will'be `drawn up to the position shown in Figure 1 and through the medium ot theV pin. andslot Connection with the brake member 29 Will revolve the brake member in an anti-clock-wise direction until the notch Q8 in the )eri )her i thereotl is enea-eed by the hook 27 ot the dog 24 at which time, ot' eoursrn the pad 33 will have been removed 'from'its contactwith the flange ot the turn table and the latter Will be allowed to revolve. Y

It is quite evident, therefore, that we have provided a combination starting and stopping mechanism for phonographs which is entirely automatic in its operationand one Which may be attached to any phonograph in use Without materially altering the' parts thereof.

It is also quite evident that we have provided an automatic stopping andstarting mechanism for phonographs Which may be adjusted to compensate for the various Widths ot selections eut on the taees et reeords.

It is evident also, that ive have provided an automatic startingand stopping mechanism for phonographs which can be applied with a minimum of time and labor and one Which will conserve the energy of the spring by immediately stoppin g the turn table when the selection has been completely played and also Will start it at the'proper time or when the needle ot the sound box has been placed substantially adjacent the outer groove in the record. y

lVhile ive have illustrated and described our invention with some degree of particularity, We realize that in practice various al terations therein may be made. We therefore reserve the right and privilege et' changlng the 'form ot the details of construction or otherwise altering the arrangement ot the correlated parts Without departing from the spirit of the invention or the scope of' the appended claims.

Having thus described our invention `what We claim as new and desire to secure by United States Letters Patent is 1. The combination with a phonograph comprising a movable reproducing unit carrying arm and a record carrying turn table;

ot a stop member, a. spring for normally urgmg the stop member against the turn table an extension on the arm, a latchV for holding said step member', a standard, and a pin ireely slidable therein and operable by a movement of said extension for releasing saidlatch to permit operation of said stop member.

2. The combination With a phonograph comprising a movable reproducing unit carry'fing arm and a record carrying turn table; of a stop member, a spring for normally urging the stop member against the turn table,v an extension on the arm, a link onk the armv movable to a position to permit operation of said stop member, said link constituting an Y table; oic a stop member, a spring for normally urging the stop member against the turn table, an extension on the arm, a link on the arm movable to a position to lpermit operation of said stop member, a latch for holding said 'stop member in inoperative position,

means operable by a movement of said eXten-' Y sion ttor releasing said latch to permit opera.-

tion of said stop member and said link being further operable to reset said stop member after the ysame has functioned.

4. The combination with a phonograph comprising a movable reproducing unit carrying arm and a record carrying turn table; of a pivoted stop member, means for normally urging it to operative position against the turn table, a dog for holding the stop at inoperative position, an extension on the arm, an intermediate freely sliding member in the path of the extension for releasing said dog to permit operation o'f said stop, and an adjusting screw carried by said extension for making contact with said sliding member.

5. The combination with a phonograph comprising a movable reproducing unit carrying arm and a record carrying turn table; of a pivotedstop member, means for tures'.

normally urging it to operative position against thefturn table, a dog for holding the stop at inoperative position and an extension on the arm, an intermediate slide member in the path ofthe extension ior releasing said dog to permit operation of said stop, a `link connecting the extension and the stop `member and having a pin and slot attachment tov the'latter whereby free operation of the stop' member is permitted when the dog is released and sai-d link operating to move the stop to Vinoperative position when the extension is movednin a direction away from said slide vout of turn table engagement, av freelyy movable slide in the path of said extension `for operating the dogl and an adjusting screnT in said extension for 'operating said slide when the extension has moved a predetermined dis-y tance.

kv'Z'.'The combination With a phonograph comprising a movable reproducing unit carrying arm and -a record carrying turn table; of an extension adjustably secured to the arm. a pivoted turn table engaging stop, a

spring for normally urging the stop toward` the turn table, a dog for releasably holdingv the stop ont of turn table engagement, aslide in the path of said extension for operating the dog, an adjusting screw in said extension for operating said slidev when the extension has moved appredetermined distance in one direction and a linkfor moving the stop out of engagement with the turn table and into position to beheld by the dogwhen the eXten-y s'ion has moved a predetermined distance in the opposite direction. v

In testimonywhereof We aiiix our signai, A'Jomv n. Nook.'`

[LL s] KIRIAKOS Pao-nis. [L 8.] 

